Pipe-covering machine.



J. R. FRENCH. PIPE COVERING MACHINE. APPLICATION FILED AUG.5. 1913.

Patented Aug. 24, 1915.

3 SHEETS-SHEET I.

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J. R. FRENCH. PIPE COVERING MACHINE.

APPLICATION FILED AUG.5. 1913.

3 SHEEYTSSHEET 2.

Patented Aug. 24, 1915.

4 A M I. d S 6 3 0w" m 4 r J T aw D1 .l- R. FRENCH.

PIPE COVERING MACHINE APPLICATION FILED AUG.5|1913. 1,151,096.

JOHN R. FRENCH, OF LOS ANGELES, CALIFORNIA, ASSIG-NOR TO LACY MANUFACTURING COMPANY, .OF LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA.

FIFE-COVERING- MACHINE.

Application filed August 5, 1913. Serial No. 783,057.

To all whom it may concern:

Be it known that I, JOHN R. FRENCH, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Pipe-Covering Machine, of which I the following is a specification.

This invention relates to pipe covering machines and comprises a machine which is adapted to automatically wind a protective covering around the pipe.

Pipe constructed of iron or steel is often exposed to corrosive conditions, causing it to quickly deteriorate. This is especially the case where electrolysis occurs, and is avoided by excluding moisture from the pipe. It has heretofore been customary to wrap the pipe by hand with a covering and then coat the outside of the covering with some waterproofing compound. This method, however, is expensive and requires considerable time.

The present invention provides means for supporting and rotating the pipe tobe covered and for winding a covering strip onto the pipe, and for coating this covering strip with waterproofing compound immediately before it is wound on the pipe, so that the strip is thoroughly waterproofed and the seams are closed and the covering caused to firmly adhere to the pipe. 4

Referring to the drawings: Figure 1 is a plan view of the machine. Fig. 2 is a rear elevation of the machine. Fig. 3 is a front elevation of the machine. Fig. 4 is an end view of the head end of the machine. Fig. 5 is an elevation looking at the rear face of the gearing which is located behind the apron. Fig. 6 is a horizontal section through the gearing on line ww Fig. 5. Fig. 7 is a plan view of a portion of the water proofing box. Fig. 8 is a side elevation of what is shown in Fig. 7. Fig. 9 is an enlarged detail in elevation of one of the feed rod supports. Fig. 10 is a section on line a: w Fig. 9. Fig. 11 is a partial section on line ec -90, Fig. 1. Fig. 12isa section on line'm 'm Fig. 10. i

1 designates the head stock of the machine and 2 designates the tail stock. The head stock has a spindle 3 with a chuck 4 which carries one end of the pipe 5 which is to be covered, and the other end of the pipe is detachably engaged by a support 6 which is slidable in the tail stock 2 to enable the pipe to be removed or inserted.

7 designates the covering strip which is wound on the pipe and which may be of any desired material. In practice I have been using a tar paper with good results. This covering strip is supplied from a reel 8 which is mounted in a bracket 9 which is carried by a carriage 10 which is adapted to travel along the bed 11 of the machine. Also mounted on the carriage 10 is a pan 12 and a U-shaped frame 13 is supported rigidly on a shaft 14 which is journaled in the pan 12. A crank 15 is rigidly secured to the shaft 14. and an arm 16 is pivoted to the crank 15 and is formed with two notches 17, either one of which is adapted to en gage a pin 18 to hold the crank 15 in a raised or depressed position, and thereby hold the roller 19 which is carried by the U-shaped frame 13, either in the bottom of the pan or raised out of the pan in a position indicated in dotted lines in Fig. 8. The pan 12 contains the waterproofing material and'the strip 7 passes from the reel 8 down into the waterproofing. material in the pan, thence over the roller 19 andout of the pan onto the pipe 5. In practice I have been using hot asphaltum as the waterproofing material and in order to keep this material hot, I provide electric resistance 20 which I locate under the pan 12. 13 is an electrical connection which leads to the resistance 20. Also mounted on the carriage is a sand box 21 having openings 22 for the discharge of sand, onto the covering immediately after it is wound on the pipe, the discharge of sand being regulated by sliding gate 23. In order to prevent the sand from falling on the bed I provide a shield 24 which is pivotally supported on a shaft 25 and a spring 26 yieldingly holds the same in the position shown in Fig. 11.

At the rear side of the bed is-a narrow boxv Patented Aug. 24, 1915.

.by a handle 37 on the front of the apron,

and by turning the handle 37 the plate 32 may be slid on the apron 33 to move the bevel gear 29 into or out of mesh with a bevel gear 38 on the apron 33. The gear 38 drives a reducing gearing 39 which opcrates a pinion 40 meshing with a rack 41.

The pinion 40 has a shaft 42 which is mounted in an elongated bearing permitting a sufficient vertical movement to engage or disengage the pinion from the rack, and the shaft 42 is carried by a plate 43 with a notched end 44 adapted to be operated by an eccentric pin 45 on a shaft 46 operated by a handle 47 on the front of the apron.

The feed shaft 28 is driven by a pulley 48 at the tail end and at the head end the feed shaft 28 drives the head spindle 3 tl1rough the medium of a reducing gearing 50. In order to support the feed shaft 28, I provide rock arms 51. Each rock arm, as shown in detail in Fig. 9, is pivoted at 52 and has two concave ends 53 either of which is adapted to engage the feed shaft 28 and support the same from sagging. The hub of the arm 51 has two notches 54 and a detent 55 pivoted at 56 to the bed 11 is adapted to engage either of the notches and hold the arm in either of its two positions. A spring 57 yieldingly holds the detent in engagement with the notch. When the carriage arrives at the detent 55 a beveled projection 57 on the apron 33, see Figs. 9, 10 and 12, presses in the detent 55 and disengages it from its notch'54 in the arm 51 so that the farther forward movement of the apron causes the projection 57 to act directly against the arm 51, swings the arm into its lower position and raising the associated arm behind, thus allowing the apron to pass the arms without removing the support of one or other of the arms from the feed shaft. When the carriage arrives at the end of the bed it strikes the end of a shifter 58 which is connected to a lever 59 which operates a clutch 60 to release the pulley 48 and thereby automatically arrest the movement of the carriage at the end of its travel. The lever 59 may also be operated by an overhead rod 61 suspended from the supports 62.

In operation the strip passes from the reel 8 down into the hot compoundin the pan 12 and the strip is thus coated on both sides im- Inediately before it is wound on the pipe.

and also seals the spiral seam. Before the outside coating dries, the sand from the box 21 is applied.

What I claim is:

lfMeans for rotating a pipe,cmeans for feeding a covering strip to the pipe, means for causing said feeding means to travel along the pipe, means forcoating said strip with a compound before it is applied to the pipe, and means carried by said feeding means for distributing protective material on the coated covering after the covering is wound on the pipe.

2. Means for rotating a pipe, a carriage traveling along said pipe, a reel on said carriage, a sand box carried by said carriage, a pan on said carriage, a roller in said pan.

3. A bed with a head stock and tail stock, a pipe supported between the headland tail stocks, means for rotating said pipe, a carriage traveling along said bed, a reel on said carriage, a pan on said carriage adapted to contain a water-proofing compound, and an electric resistance on said carriage for heating said compound, an electrical connection leading to said electric resistance, and a box on the side of said bed, said electric connection being loosely coiled in said box.

4. A bed, a pipe supported thereby and means for'rotating said pipe, including a feed shaft extending along said bed, means for supporting said feed shaft comprising a pivoted arm having two bearing faces, a car riage traveling along said bed, and means operated by said carriage for tilting said arm to move one of its supporting faces out of engagement with said feed shaft and the other bearing face into engagement therewith to permit the carriage to pass.

5. A bed, a carriage traveling along the bed, a pipe rotatably supported on the bed, means for rotating the pipe, including a feed shaft extending along the bed, gearing on said carriage and operated by said feed shaft for propelling the carriage, means for supporting said feed shaft at a point in the path of movement of said carriage, and means for disengaging said supporting means from the shaft to permit the carriage and its gearing to pass and to reengage said supporting means with said feed shaft after the carriage and its gearing have passed said support.

6. A bed, a carriage traveling along said bed, a pipe rotatable above said bed, a reel on said carriage, a pan on said carriage adapted to hold a compound, a reel on said carriage for supporting a strip and adapted to be wound on saidpipe, a sand box carried by the carriage and a plate projecting from the sand box toward the bed to protect the bed from falling sand.

7. A bed, a carriage traveling along said bed, a pipe rotatable above said bed, a reel on said carriage, a pan on said carriage adapted to hold a compound, a reel on said carriage for supporting a strip and adapted to be Wound on said pipe, a sand box carried by the carriage and a plate projecting from the sand box toward the bed to protect the bed from falling sand, said plate being piv- 

